Phone with e-mail client.

[Pondlife]

O2 have very little technical information on the phone and very poor support for configuration.

Try here for techy stuff

[kirk]

Blackberry's rule; If all you want is email then you can't beat them!

[Bluebird]

Blackberry's rule; If all you want is email then you can't beat them!

No I want e-mail + office applications [ word, excel etc ]

I looked at the HTC range and some reviews aren't so good
The SonyErricson P990i looks good but a bit big, I'm happy with a windows phone WITHOUT a keyboard.